package util

import (
	"admin/pkg/setting"
	"github.com/dgrijalva/jwt-go"
	"time"
)

var jwtSecret = []byte(setting.AppSetting.JwtSecret)

type Claims struct{
	Username string `json:"username"`
	Password string `json:"password"`
	jwt.StandardClaims
}
//生成token
func GenerateToken(username,password string)(string,error){
	nowTime := time.Now()
	expireTime := nowTime.Add(3*time.Hour)

	claims := Claims{
		username,
		password,
		jwt.StandardClaims{
			ExpiresAt:expireTime.Unix(),
			Issuer:"gin-admin",
		},
	}

	tokenClaims := jwt.NewWithClaims(jwt.SigningMethodHS256,claims)

	token,err := tokenClaims.SignedString(jwtSecret)
	return token,err
}
//解析token
func ParseToken(token string)(*Claims,error){
	tokenClaims,err := jwt.ParseWithClaims(token,&Claims{},func(token *jwt.Token)(interface{},error){
		return jwtSecret,nil
	})
	if tokenClaims != nil{
		if claims,ok := tokenClaims.Claims.(*Claims); ok && tokenClaims.Valid{
			return claims,nil
		}
	}
	return nil,err
}
